Interoperability between Boost and C++11

Question

What is the extent of interoperability between C++11 and a recent version of Boost (say 1.55) built with a C++11 compiler.

1. Does the behavior of any library feature change depending on whether I built the libraries with c++11 flags enabled or not?
2. How do language features like lambda functions cooperate with Boost's lambdas?

Answer 1

1. You cannot use objects built with gcc with and without -std=c++11 together. You will get link errors or even runtime crashes. I cannot vouch for other C++ implementations. So at least with gcc, you do need to build a separate version of Boost with c++11 mode enabled.
2. They are pretty much independent. They don't cooperate and don't interfere with each other.

EDIT I see people are still reading (and upvoting!) this answer. Point 1 is no longer true (or perhaps never was true). Versions of gcc from I think 5.1 upwards use an ABI compatible with -std=<anything> by default.